[Top image rendered in Poser 7, Bottom image rendered in Carrara 6]

Hi all, I am very new to 3d, so excuse this question if it seems noobish, because it is :)

I imported a Poser scene to Carrara and rendered it to find that the final render didnt look much like the one in Poser, now I am certain it is fixable by me, but I just dont know where to start, the Poser render is smoother looking, but the Carrara one seems more grainy or bumpy and the models textures have lost their natural look.

Have I done something wrong or is it just a case of learning how to tweak the shaders in Carrara after importing some Poser content?

Both renders were done with a single spotlight pointing at the subject and afaik both renders had ray tracing turned on.

Any advice or insight will be most welcomed.